Re: Recovery Assistance

On 01/28/2017 11:23 PM, Brian Mills wrote:
> I presume this is a binary log file for the database.
>
> Am I able to recover to a point in time using this log file?
>
> What I would do in SQL Server would be recover to a point in time, say a
> bit before the last completed transaction time the log mentions, then
> take a backup. Is that possible in postgres?

Yes, though I am not sure you have the setup to do it. I would suggest
reading the below to see how much of it applies:

https://www.postgresql.org/docs/9.3/static/continuous-archiving.html

In particular:
24.3.4. Recovering Using a Continuous Archive Backup

https://www.postgresql.org/docs/9.3/static/recovery-target-settings.html

>
> The log mentions this:
> 2017-01-27 20:36:18 AEDT LOG: last completed transaction was at log
> time 2017-01-24 02:08:00.023064+11
>
> (which is moments before, or possibly as the disk filled up doing a db
> backup dump)
>
> *Brian Mills*
> CTO
>
>
> *Mob: *0410660003 <tel:0410660003>
> *Melbourne* 03 9012 3460 <tel:03%209012%203460> or 03 8376 6327
> <tel:03%208376%206327> *|* * **Sydney* 02 8064 3600
> <tel:02%208064%203600> *|* *Brisbane* 07 3173 1570 <tel:07%203173%201570>
> Level 1 *|* 600 Chapel Street *|* South
> Yarra*|* VIC *|* 3141 *|* Australia
>
> <https://www.facebook.com/TryBooking/> <https://twitter.com/trybooking> <https://www.linkedin.com/company/trybooking-com>
>
> On 29 January 2017 at 12:58, Brian Mills <brian(at)trybooking(dot)com
> <mailto:brian(at)trybooking(dot)com>> wrote:
>
> I have a consistent sql dump from 24 hour previous.
>
> The file level backup was done with rsync -a of full data directory
> after the issue occurred so could reset as I learned.
>
> Brian
>
>
> On Sun, 29 Jan 2017 at 9:18 am, Adrian Klaver
> <adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>> wrote:
>
> On 01/28/2017 01:55 PM, Brian Mills wrote:
> > Yes, its the last one in the directory, pg_xlog directory
> >
> > ...more files...
> > -rw------- 1 postgres postgres 16777216 Jan 21 10:05
> > 0000000100000005000000A1
> > -rw------- 1 postgres postgres 16777216 Jan 22 21:29
> > 0000000100000005000000A2
> > -rw------- 1 postgres postgres 16777216 Jan 24 02:08
> > 0000000100000005000000A3
>
> Best guess is the last WAL is not complete.
>
> From your original post:
> "Attempt 2 - startup manually and let it try recovery
>
> I restored my file level backup and started again. "
>
> How was the file level backup done?
>
> >
> >
> > *Brian Mills*
> > CTO
> >
> >
> > *Mob: *0410660003 <tel:0410%20660%20003> <tel:0410660003
> <tel:0410%20660%20003>>
> > *Melbourne* 03 9012 3460 <tel:(03)%209012%203460>
> <tel:03%209012%203460> or 03 8376 6327 <tel:(03)%208376%206327>
> > <tel:03%208376%206327> *|* * **Sydney* 02 8064 3600
> <tel:(02)%208064%203600>
> > <tel:02%208064%203600> *|* *Brisbane* 07 3173 1570
> <tel:(07)%203173%201570> <tel:07%203173%201570>
> > Level 1 *|* 600 Chapel Street *|* South
> > Yarra*|* VIC *|* 3141 *|* Australia
> >
> > <https://www.facebook.com/TryBooking/
> <https://www.facebook.com/TryBooking/>>
> <https://twitter.com/trybooking
> <https://twitter.com/trybooking>>
> <https://www.linkedin.com/company/trybooking-com
> <https://www.linkedin.com/company/trybooking-com>>
> >
> > On 29 January 2017 at 08:18, rob stone <floriparob(at)gmail(dot)com
> <mailto:floriparob(at)gmail(dot)com>
> > <mailto:floriparob(at)gmail(dot)com <mailto:floriparob(at)gmail(dot)com>>>
> wrote:
> >
> > Hello Brian,
> > On Sun, 2017-01-29 at 07:16 +1100, Brian Mills wrote:
> > > Hi,
> > >
> > > No, it hasn't changed since the first time I looked at it.
> > >
> > > root(at)atlassian:/home/tbadmin# ps ax | grep post
> > > 1364 ? Ss 0:00 /usr/lib/postfix/master
> > > 5198 pts/3 S 0:00 su postgres
> > > 5221 pts/3 S 0:00
> /usr/lib/postgresql/9.3/bin/postgres -D
> > > /etc/postgresql/9.3/main
> > > 5222 ? Ss 0:10 postgres: startup process
> recovering
> > > 0000000100000005000000A3
> > > 11161 pts/4 S+ 0:00 grep --color=auto post
> > >
> >
> >
> > Does this WAL file exist "0000000100000005000000A3"?
> >
> > Cheers,
> > Rob
> >
> >
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>
> --
> *Brian Mills*
> CTO
>
>
> *Mob: *0410660003
> *Melbourne* 03 9012 3460 or 03 8376 6327 *|* * **Sydney* 02 8064
> 3600 *|* *Brisbane* 07 3173 1570
> Level 1 *|* 600 Chapel Street *|* South
> Yarra*|* VIC *|* 3141 *|* Australia
>
> <https://www.facebook.com/TryBooking/> <https://twitter.com/trybooking> <https://www.linkedin.com/company/trybooking-com>
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com